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post #1 of 13 (permalink) Old 06-08-2014, 12:46 AM Thread Starter
Ras
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fish safe?

http://htgsupply.com/Product-Exhale-CO2-Bag

I haven't ever heard of these in the aquarium hobby so I assume it's for a reason, but figured I'd ask.
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post #2 of 13 (permalink) Old 06-08-2014, 12:49 AM
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How would you get the CO2 into the water?
These bags are intended to be in the air.

Hmm... maybe put them in a box with an air pump?
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post #3 of 13 (permalink) Old 06-08-2014, 08:29 AM Thread Starter
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i was thinking just pop the bag inside a diy co2 lol
instead of water yeast and sugar inside the bottle just put the bag
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post #4 of 13 (permalink) Old 06-08-2014, 12:15 PM
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As Diana mentioned, it would be difficult to get the slightly enriched CO2 air into the water column.

Furthermore, the air would be precisely that; only slightly CO2 enriched. You might get similar results (and far cheaper) by collecting exhaled air (of which a small percentage is CO2) and trying to inject that into your aquarium.

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post #5 of 13 (permalink) Old 06-08-2014, 08:43 PM
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I do not think there would be enough pressure built up to force the CO2 into the water if the bag is just in one of those CO2 units.

That is why I suggested setting it up in a box with an air pump. The box would have CO2 enriched air, and the pump would take care of placing it under water.
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post #6 of 13 (permalink) Old 06-08-2014, 09:09 PM Thread Starter
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ohh i see what you mean, i wasn't aware they didn't build up pressure
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post #7 of 13 (permalink) Old 06-10-2014, 01:42 AM
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I'm a bit skeptical of that product. It seem to essentially be a bag of woodchips/mulch that you toss in a corner and let rot...

You'd probably get about the same results with a dirted tank - the decaying organics produces CO2.
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post #8 of 13 (permalink) Old 06-10-2014, 04:47 AM
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There is text in the link includes the term 'mycelial mass'.
That is, fungus.
So there are living organisms in there.
I'm with lochabar- the natural processes in the aquarium will supply CO2 from the breakdown of organic matter. Not much, but just enough that low tech tanks depend on this as one of the main sources of CO2.
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post #9 of 13 (permalink) Old 06-10-2014, 08:54 AM
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Quote:
Originally Posted by lochaber View Post
I'm a bit skeptical of that product. It seem to essentially be a bag of woodchips/mulch that you toss in a corner and let rot...
Quote:
Originally Posted by Diana View Post
There is text in the link includes the term 'mycelial mass'.
That is, fungus.
So there are living organisms in there.
Yes, this was what I was trying to get at in my first post.

To me, it sounds like you will just allow fungus to grow, generating CO2 that you can then (somehow) feed into your aquarium. As Diana mentioned, it will not generate pressure, so you would have to enclose it in a box with an air pump and then pump the "CO2 enriched" air (and I use the term enriched loosely) into the aquarium.

This is also why I suggested (somewhat jokingly, of course) to just exhale into a garbage bag and then pump the CO2 enriched air into your aquarium, considering the price of that product.

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post #10 of 13 (permalink) Old 08-04-2014, 09:28 PM Thread Starter
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sorry for thread necromancy here
anyways I just saw a video of them testing the air in a small room after activating one of those bags and the air tested over 1100 ppm
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post #11 of 13 (permalink) Old 08-05-2014, 02:12 AM
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sorry for thread necromancy here
anyways I just saw a video of them testing the air in a small room after activating one of those bags and the air tested over 1100 ppm
Normal atmospheric CO2 levels are ~400 ppm, so you are not getting significantly more CO2.

The levels reached (1100 ppm), can usually be achieved in a crowded classroom, etc.

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post #12 of 13 (permalink) Old 08-05-2014, 03:55 AM
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Quote:
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Normal atmospheric CO2 levels are ~400 ppm, so you are not getting significantly more CO2.

The levels reached (1100 ppm), can usually be achieved in a crowded classroom, etc.
You can quadruple that when congress is in session.

Dilution is the solution for the pollution.
Quote me as saying I was misquoted.
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post #13 of 13 (permalink) Old 08-05-2014, 04:53 AM
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So, just hold classes in your fish room each morning. Make it really interesting. Standing room only.
Then close the door (air tight seal).
When all the students keel over, the air will be so rich in CO2 that it will raise the CO2 in the tanks. Run a compressor big enough to handle all the tanks, or else an air pump on each tank.
Then the increase in O2 (all the plants will be pearling) will revive your students, and you can declare the experiment a success.
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